W83194BR-372 데이터 시트보기 (PDF) - Winbond

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W83194BR-372

CLOCK GENERATOR FOR SIS 746/748 CHIPSETS

Winbond 

W83194BR-372

5.3 Fixed Frequency Outputs

PIN

PIN NAME TYPE

DESCRIPTION

REF0

OUT 14.318MHz output.

2

FS0&

INtd120k

Latched input for FS0 at initial power up for H/W selecting the

output frequency. This is internal 120K pull down.

REF1

OUT 14.318MHz output.

3

FS1&

INtd120k

Latched input for FS1 at initial power up for H/W selecting the

output frequency. This is internal 120K pull down.

4

REF2

OUT 14.318MHz output.

27

48MHz

OUT 48MHz clock output for USB.

26

24_48MHz

OUT

24MHz (default) or 48MHz clock output, it could be R/W by I2C

control after power on reset period. Select by register 5 bit 7.

5.4 I2C Control Interface

PIN

PIN NAME TYPE

34

SDATA*

I/OD

35

SCLK*

IN

DESCRIPTION

Serial data of I2C 2-wire control interface with internal pull-up

resistor.

Serial clock of I2C 2-wire control interface with internal pull-up

resistor.

5.5 Power Management Pins

PIN

PIN NAME TYPE

DESCRIPTION

Power Down Function. This is power down pin, low active (PD#).

33

PD#*

INtp120k Internal 120K pull up

12

PCI_STOP#*

INtp120k

Active low, Stop all PCI clock output besides the free running

clocks.

44 CPU_STOP#* INtp120k Active low, Stop all CPU clock outputs.

5.6 Power Pins

PIN

1

13,19

29

38,42

28

11

48

36

5, 8, 18, 24, 25,

32, 37, 41, 45

PIN NAME

VDDREF

VDDPCI

VDDAGP

VDDCPU

VDD48

VDDZ

VDDI

VDDA

GND

TYPE

PWR

PWR

PWR

PWR

PWR

PWR

PWR

PWR

DESCRIPTION

3.3V power supply for REF.

3.3V power supply for PCI.

3.3V power supply for AGP.

2.5V power supply for CPU.

3.3V power supply for 48MHz.

3.3V power supply for ZCLK.

2.5V power supply for IOAPIC

3.3V power supply for Analog core logic.

PWR Ground pin

-4-

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